Farmers' Stepwise Adoption of Technological Packages: Evidence from the Mexican Altiplano
利用墨西哥高原两个降雨区的田间实验和调查数据，证明农民会理性地分步采用改良品种、化肥和除草剂等农业技术组件，而非一次性采用整个技术包。
Abstract Agricultural research and extension programs in developing countries, rather than following the conventional package approach, should be designed to take into account the fact that farmers adopt improved technological components in a stepwise manner. On‐farm experimental and survey data collected from two rainfall zones in a high valley of Mexico are synthesized to show that farmers have rationally followed a stepwise process of adopting improved varieties, fertilizer, and herbicide for barley, reflecting the relative profitability and riskiness of each component in each zone. Despite significant interactions between the components, it was still possible for farmers to adopt individual components in a sequential manner.